476 CIIITONIN^. 



Species of Chatopleura. 



fulva, Wood. nobilis, Gray. 



Hanleyi, Bean. Peruviana, ham. 



Henuahi, Gray. rugosa, Sow. 



laqueata, Reeve. Watsonii, Sow. 



Genus ONITHOCHITON, Gray. 



Mantle-margin densely covered with short bristles or 

 chafT-like scales. 



Shell with the valves external, transverse, broad ; the 

 hinder valve with the apex terminal. 



ElV. O. undulatus, Quoy and Gaimard, pi. 54, fig. 3. 



The lamina of insertion of the anterior valve in this 

 genus is few-lobed, that of the posterior sub-emarginate 

 and entire, and that of the middle bi-lobate. The species 

 of OnitJtochiton are not very numerous, and are found 

 chiefly in Australia and New Zealand. 



Siyecies of OnitJiocJiiton. 



concentricus, Reeve. Sueziensis, Reeve. 



Lyellii, Sow. undulatus, Quoy and Gam. 



puncticulatus, Reeve. 



Genus ENOPLOCHITON, Gray. 



Mantle horny, sparsely covered with oblong, unequal, 

 elongated, flattened, calcareous scales. 



Shell with the valves transverse, external, sub-cordi- 

 form ; the hinder valve with the apex terminal. 



E.i: E. niger, Barnes, pi. 54, fig. 4. 



